Filter-ventilator



2 Sheets-Sheet 1.

(No Model.)

T. B. HOWE.

FILTER VENTILATOR.

J Invenior.

' Wjinessea. G4, K AZWW (No Model.) 2 Sheets-Sheet 2. T. B. HOWE.

FILTER VENTILATOR.

Patentedfiept. 8, 1885.

..T%2 enior f 1 2 213 Jttorneys.

W z'inesse s.

UNTTED STATns PATENT FFICE.

FILTER-VENTILATO R.

SPECIFICATION forming .part of Letters Patent No. 325,803, datedSeptember 8,1885. Application filed July G, lfiSS. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS B. HOWE, of Scranton, in the county ofLackawanna, State of Pennsylvania, have invented certain new and usefulImprovements in Filter-Ventilators; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming a part of thisspecification,

and to the figures and letters -of reference marked thereon.

Heretofore numerous attempts have been made to prevent the entrance intorailway cars of dust, cinders, &c.-, which at present render travelingdisagreeable, and at the same time ventilate the car thoroughly; andnearly all such attempts have resulted in the invention of some sort ofshield or guard to be placed in front of a car-window, so that dust,&c., would not enter when the window .wasop'en; but, so far as I amaware, none of these devices will accomplish the purpose in asatisfactory manner, because an eddy will form behind the guard and drawin, as it were, the dust, cinders, 83c. Screens have also been appliedto car-windows, but .with indifi'erent success, as only the largercinders could be kept out and the fine dust would pass through and enterthe car.

,Having theobject in view of providing the passenger-car with the meansfor preventing the ingress of dust, 820., not only through open windows,but around their frames, through ventilators and doors, I havemade theinvention'shown and described herein.

Figure 1 is a side view of a car provided with my invention. Fig. 2 is asectional view on the line a: a: of Fig. 1. Fig. 3 isa sectional view onthe line 3/ y of Fig. 1. Fig. 4 is a view of modification. Fig. 5 isaperspective view, partly in section, of one of the air-filters removed.

Similar letters of reference in figures denote the same parts.

A represents the body of an ordinary passenger-car; B, a casingextending from end to the several end of the car and on aline with thewindows thereof, consisting ofa lower sill, C, secured just beneath thebottoms of the car-windows, an upper molding or top, D, just above thetops of the windows, and the side E,composed deluge of dustor to a of aseries of glass windows, F, in line with and corresponding in number tothe car-Windows, and between each of these panes of glass an air-filter,G, constructed as shown in Fig. 5-that is, of a frame, 9, having ineither side a piece of wire cloth or gauze, and between these two piecesof gauze is a layer of wool or felt and a layer of curled hair,th'e'woolheing on the-inside and the hair-on'the outside, or either orboth of these may be employed.

A filter thus constructed will effectually prevent the passage throughit of any dust or cinders, but will not prevent The curled hair willarrest the larger particles of dust,.cinde1's, 820.; and the wool thefiner, thus thoroughly purifying the air before it enters the spacebetween the casing and can.

Air will enter the space between the casing B. and car onlythrough theair-filters, so that the windows may be opened or removed entirelywithout subjecting the passenger to a direct draft,as would be the casewere the panes F, which I term storm-glasses, removed, and as thefilters are between the windows the air entering is obliged to take thecourse indicated by the arrows in Fig. 2.

This casing can be used in winter for the purpose of keeping the carwarm by replacing the filters by solid panels, space between the casingand car and answering the purpose of double windows generally employed.

.In Fig. 4 I have shown a modified arrangement-,in which I dispense withthe entire outside casing, place the filters in the body of the carbetween the windows, and locate the glass frames F in the same or asupplemental frame near the ordinary windows,and recess the side of thecar somewhat, so that the air entering through the filters can come intothe space between the windows,-or,if the inner window is open, into thecar. 7

At the ends of the ca' on top, are also employed filters H; but in thisinstance I place a piece of wire-netting at some distance in front ofthe filter, so that it will not take fire from sparks from the engine,and I also place the filters over the openings for the ventilatorsin thetopof thecar.

The filters can be cleaned when necessary thus forming an air thepassage of air.

or desirable by passing a current of air or water through them from theinner or wool side.

My invention, while especially adapted for use on railway-cars, can aswell be applied to houses. or steamboats, and in short to any placewhere air is to be filtered-J01 instance, to the cold-air pipe of anordinary housefurnaoe.

I claim as my invention- 1. The combination, with a car, ofasupplemental frame or casinginclosing the windows thereof and providedwith the storm-windows corresponding to the windows of the car, and oneor more'air-filters located in said casing, substantially as described.

2. The combination, with a car, of a supplemental frame orcasinginclosing the windows thereof, provided with the storm-windowscorresponding with the car-windows, and a series of removable filterslocated between the stormwindows, whereby said filters can be removedwhen desired and be replaced by solid panels, substantially asdescribed.

THOMAS B. HOWE.

Witnesses:

A. S. STEUART, FRED F. CHURCH.

